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Finding the Fourth Proportional to 17,978.32, 26,955.76 and 8,618.08

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Solution

The fourth proportional to 17,978.32, 26,955.76 and 8,618.08 is: 12,921.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,978.32 : 26,955.76 = 8,618.08 : x
  2. Step 2: Convert to fraction form
    17,978.32/26,955.76 = 8,618.08/x
  3. Step 3: Cross multiply
    17,978.32x = 26,955.76 × 8,618.08
  4. Step 4: Simplify right side
    17,978.32x = 232,306,896.14
  5. Step 5: Solve for x
    x = 232,306,896.14/17,978.32
  6. Step 6: Final answer
    x = 12,921.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.